Device to Indicate Priming of an Infusion Line

Abstract

A priming indicator for a fluid infusion system includes a luer cap or other component of the infusion system having an indicator surface covered by a membrane. The membrane exhibits a first visual characteristic, such as being opaque, when dry and exhibits a second characteristic, such as becoming less opaque, when wet. Once the membrane becomes wet, indicia on the surface, which may be provided on a rod at least partially covered by the membrane, becomes visible, thereby indicating an intravenous tube to which the luer cap is secured has been primed or is nearly primed. The indicator may alternately be employed at an upstream end of an infusion set, such as at the port of a medical bag providing a supply of fluid, to indicate a low level of fluid in the medical bag.

Description

REFERENCE TO RELATED APPLICATIONS [0001]This is a non-provisional application entitled to the benefit of the filing date of U.S. Provisional Application No. 61 / 095,339, filed Sep. 9, 2008, as to all subject matter commonly disclosed therein.FIELD OF THE DISCLOSURE [0002]This disclosure relates generally to a priming indicator for a medical fluid infusion system, and more specifically, to a component of the infusion system that serves as a priming indicator to indicate when an infusion system is primed.BACKGROUND [0003]Many medical patients require precise intravenous delivery of a fluid in desired rates such as either continuous delivery or delivery having a particular flow rate profile. Continuous delivery may be accomplished using gravity or pumps. Conventional medical pumps can also provide controlled drug infusion wherein a drug may be administered at a more precise rate than gravity administration that maintains the drug concentration within a therapeutic margin and out of an u...

AI Technical Summary

Benefits of technology

[0011]A component of the present disclosure includes a housing with a cavity that holds a colored member surrounded by an opaque membrane. When the membrane becomes wet with fluid in an infusion line to which the luer cap is connected, the membrane loses its opacity, thereby turning at least partially transparent and revealing the colored member, thus indicating that contact of that component with the fluid flowing through the infusion line. When the component is placed at the end of the infusion line this contact may represent that the priming of the infusion line is complete. Fluid is prevented from flowing through an end of the component by a hydrophobic vent, which allows air to be properly expelled from the line while maintaining the liquid in the line.

Problems solved by technology

This process, however, is often time consuming and requires the constant attention of medical personnel to determine whether priming has been accomplished by watching the end of the tubing line to see if the fluid is dripping at the end of the line.

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